presumably what's going to happen is that, as energy becomes dramatically cheaper, production will shift from less-energy-intensive processes toward more-energy-intensive processes. this is likely to happen at many levels: between different routes for producing the same good (for example, pidgeon vs. dow process), between alternative goods (for example, aluminum vs. steel), between subsectors (for example, heavy industry vs. high-precision manufacturing), and across sectors (for example, manufacturing vs. services)

so, with the advent of innovations that dramatically drop the cost of energy, we should expect to see energy use grow faster than gdp. that's decoupling but in the opposite direction from the decoupling you're talking about, which has been driven by the 01973–02023 energy crisis